S-92620A345 1 1/2"-6 x 6 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
• Optimized thread engagement through coarse UNC threading that facilitates quicker assembly and reduces cross-threading risks
• Enhanced durability from Rockwell C33 hardness that maintains structural integrity under repeated loading
• Secure fastening capability with Class 2A thread fit ensuring precise, vibration-resistant connections
• Easy installation and removal via the external hex drive design that accommodates standard wrench tools
• Regulatory compliance assurance meeting industry standards for quality and environmental safety

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The partially threaded design concentrates strength where needed most while allowing for precise clamp load distribution. The zinc yellow-chromate plating creates a protective barrier against oxidation and chemical exposure, significantly extending maintenance intervals in demanding environments like construction, mining, and transportation equipment. With its coarse UNC threading and external hex drive, this fastener enables rapid installation in field conditions while maintaining the high torque requirements essential for heavy-duty applications. The combination of 150,000 psi tensile strength and Rockwell C33 hardness ensures reliable performance where vibration resistance and joint integrity are paramount.

Specification Summary & Compliance

This 1 1/2"-6 UNC hex head screw features Class 2A thread tolerances for precise fitment and is manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. With dimensions of 6 1/2" length, 2 1/4" head width, and 31/32" head height, this inch-system fastener maintains consistent quality standards for critical bolting applications.